Chess Puzzle #M6jF7 — Intermediate, White to move, endgame

Position

White: king c7; pawns a7/b6/g4. Black: king a8; pawns f2/g5. White is ahead by 1 point of material. White to move.

Solution (3 moves)

1. Opponent setup: f1=Q — pawn f2→f1, promotes to queen. Now White to move.
2. Best move: b7+ — pawn b6→b7, gives check. Opponent replies Kxa7 (king a8→a7, captures pawn).
3. Best move: b8=Q+ — pawn b7→b8, promotes to queen, gives check. Opponent replies Ka6 (king a7→a6).
4. Best move: Qb6# — queen b8→b6, delivers checkmate.

Tactical themes

advanced pawn, endgame, exposed king, long, mate, mate in 3, promotion, queen endgame. The combination ends with Qb6# delivering checkmate.

Position data

FEN: k7/P1K5/1P6/6p1/6P1/8/5p2/8 b - - 1 52

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